A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5920-01-127-0252
NSN 6105-01-413-5255
NSN 6145-00-244-4360
NSN 6650-01-311-5668
NSN 6130-00-117-3775
NSN 6135-01-390-7364
NSN 5835-01-502-9228
NSN 5975-01-287-4467
NSN 5925-01-350-3646
NSN 6610-01-149-9749
NSN 5975-00-239-2364
NSN 6110-00-573-1297